Class 4 Quiz Review

How do you calculate the thickness of the matching layer? 

• Equal to the thickness of the PZT crystals

• Twice the transducer diameter

• One fourth of the wavelength of sound in the matching layer

• One half of the pulse length

What is the conversion of pressure into voltage called?

• Voltage Amplification
• Pressure-to-Voltage Conversion
• Voltage Pressure Ratio
• Piezoelectric Effect

T/F: It is safe to sterilize the transducer with heat.

• True

• False

Which PZT crystal thickness will operate at a higher frequency?

• 1mm

• 2mm

• 3mm

• 4mm

Answer explanation

Thinner crystals operate at higher frequencies

Label A Fix This Question

• Helps Improve Image Quality

• If we exceed the curie point, this part will be affected

• Reduces Impedance Difference

• Reduces scattering caused by air molecules

Label B

• Helps Improve Image Quality

• If we exceed the curie point, this part will be affected

• Reduces Impedance Difference

• Reduces scattering caused by air molecules

Label C

• Helps Improve Image Quality

• If we exceed the curie point, this part will be affected

• Reduces Impedance Difference

• Reduces scattering caused by air molecules

Label D

• Helps Improve Image Quality

• If we exceed the curie point, this part will be affected

• Reduces Impedance Difference

• Reduces scattering caused by air molecules

Which of the following transducers will have the widest bandwidth?

Use the Equation Maximum - Minimum to get the bandwidth

• Resonance Frequency = 3MHz; Minimum Frequency = 2MHz; Maximum Frequency = 4MHz

• Resonance Frequency = 4MHz; Minimum Frequency = 1MHz; Maximum Frequency = 4MHz

• Resonance Frequency = 3MHz; Minimum Frequency = 3MHz; Maximum Frequency = 4MHz

• Resonance Frequency = 3MHz; Minimum Frequency = 4MHz; Maximum Frequency = 4MHz

Answer explanation

Maximum Frequency - Minimum Frequency = Bandwidth

The LARGEST answer will equal the WIDEST bandwidth

The answers for this question consisted of 2, 3, 1 and 0. Three was our largest number after the equation, therefore it has the widest bandwidth.

Which of the following transducers will have the widest bandwidth?

Use the Equation Maximum - Minimum to get the bandwidth

• Resonance Frequency = 3MHz; Minimum Frequency = 1MHz; Maximum Frequency = 4MHz

• Resonance Frequency = 4MHz; Minimum Frequency = 2MHz; Maximum Frequency = 5MHz

• Resonance Frequency = 3MHz; Minimum Frequency = 3MHz; Maximum Frequency = 10MHz

• Resonance Frequency = 3MHz; Minimum Frequency = 1MHz; Maximum Frequency = 2MHz

Answer explanation

Maximum Frequency - Minimum Frequency = Bandwidth

The LARGEST answer will equal the WIDEST bandwidth

The answers for this question consisted of 3, 3, 1 and 7. Seven was our largest number after the equation, therefore it has the widest bandwidth.